1CY54/74FCT480T Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. CY54/74FCT480T Dual 8-Bit Parity Generator/Checker SCCS025 - May 1993 - Revised March 2000 Features • Function, pinout and drive compatible with FCT and F logic • FCT-A speed at 7.5 ns max. (Com’l) FCT-B speed at 5.6 ns max. (Com’l) • Reduced VOH (typically = 3.3V) versions of equivalent FCT functions • Edge-rate control circuitry for significantly improved noise characteristics • Power-off disable feature • Matched rise and fall times • ESD > 2000V • Fully compatible with TTL input and output logic levels • Sink Current 64 mA (Com’l), 32 mA (Mil) Source Current 32 mA (Com’l), 12 mA (Mil) • Two 8-bit parity generator/checkers • Open drain Active LOW parity error output • Expandable for larger word widths Functional Description The FCT480T is a high-speed dual 8-bit parity generator/checker. Each parity generator/checker accepts eight data bits and one parity bit as inputs, and generates a sum and parity error output. The FCT480T can be used in ODD parity systems. The parity error output is open-drain, designed for easy expansion of the word width by a wired-OR connection of several FCT480T type devices. Since additional logic is not needed, the parity generation or checking times remain the same as for an individual FCT480T device. The outputs are designed with a power-off disable feature to allow for live insertion of boards. Logic Block Diagram A1 B1 C1 D1 ODD1 E1 F1 G1 H1 PAR1 ERR CHK/GEN A2 B2 C2 D2 ODD2 E2 F2 G2 H2 PAR2 FCT480T–1 Pin Configurations DIP/SOIC/QSOP Top View C1 B1 A1 NC VCC A2 B2 C2 NC E2 D2 G2 F2 11 10 9 8 7 6 5 12 4 13 3 14 2 1 15 16 28 17 27 18 26 19 20 21 22 23 24 25 H2 CHK/GEN ODD1 GND NC ODD2 ERROR PAR2 E1 D1 PAR1 H1 G1 NC F1 LCC Top View A1 1 24 VCC B1 2 23 A2 C1 3 22 B2 D1 4 21 E1 5 20 F1 G1 6 19 C2 D2 E2 7 18 F2 H1 8 17 G2 PAR1 9 16 H2 CHK/GEN 10 PAR 2 ODD1 11 15 14 GND 12 13 ODD2 FCT480T–2 ERROR FCT480T–3 Copyright © 2000, Texas Instruments Incorporated CY54/74FCT480T Function Table Inputs Outputs A1 to H1 A2 to H2 CHK/GEN PAR1 PAR2 Number of A1 to H1 Inputs HIGH is EVEN Number of A2 to H2 Inputs HIGH is EVEN H H L H L Number of Inputs HIGH A2 to H2 is ODD Number of A1 to H1 Inputs HIGH is ODD Number of A2 to H2 Inputs HIGH is EVEN Number of A2 to H2 Inputs HIGH is ODD ODD2 ERROR H L L H H H L L L L H L L H H L L X X H H L H H H L H L L H H H L H L L L H L L H L L L X X H L L H H H H L L L H L L H H L H H L L L L H L L X X L H L H H H H H L L H L H L H L H L L L L L L H X X L L H L Maximum Ratings[1, 2] ODD1 Static Discharge Voltage............................................>2001V (per MIL-STD-883, Method 3015) (Above which the useful life may be impaired. For user guidelines, not tested.) Operating Range Storage Temperature .................................–65°C to +150°C Ambient Temperature with Power Applied .............................................–65°C to +135°C Range Supply Voltage to Ground Potential ............... –0.5V to +7.0V DC Input Voltage............................................ –0.5V to +7.0V Range Ambient Temperature VCC Commercial All –40°C to +85°C 5V ± 5% Military[3] All –55°C to +125°C 5V ± 10% Notes: 1. Unless otherwise noted, these limits are over the operating free-air temperature range. 2. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 3. TA is the “instant on” case temperature. DC Output Voltage ......................................... –0.5V to +7.0V DC Output Current (Maximum Sink Current/Pin).......120 mA Power Dissipation ..........................................................0.5W 2 CY54/74FCT480T Electrical Characteristics Over the Operating Range Parameter VOH Description Output HIGH Voltage VOL Output LOW Voltage VIH Input HIGH Voltage VIL Input LOW Voltage [5] Test Conditions Min. Typ.[4] Max. Unit VCC = Min., IOH = –32 mA Com’l 2.0 V VCC = Min., IOH = –15 mA Com’l 2.4 3.3 V VCC = Min., IOH = –12 mA Mil 2.4 3.3 V VCC = Min., IOL = 64 mA Com’l 0.3 0.55 V VCC = Min., IOL = 32 mA Mil 0.3 0.55 V 2.0 V 0.8 VH Hysteresis All inputs 0.2 VIK Input Clamp Diode Voltage VCC = Min., IIN = –18 mA –0.7 II Input HIGH Current IIH Input HIGH Current IIL V V –1.2 V VCC = Max., VIN = VCC 5 µA VCC = Max., VIN = 2.7V ±1 µA Input LOW Current VCC = Max., VIN = 0.5V ±1 µA IOZH Off State HIGH-Level Output Current VCC = Max., VOUT = 2.7V 10 µA IOZL Off State LOW-Level Output Current VCC = Max., VOUT = 0.5V –10 µA IOS Output Short Circuit Current[6] VCC = Max., VOUT = 0.0V –225 mA IOFF Power-Off Disable VCC = 0V, VOUT = 4.5V ±1 µA –60 –120 Capacitance[5] Parameter Description Typ.[4] Max. Unit CIN Input Capacitance 5 10 pF COUT Output Capacitance 9 12 pF Notes: 4. Typical values are at VCC=5.0V, TA=+25˚C ambient. 5. This parameter is specified but not tested. 6. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter tests, IOS tests should be performed last. 3 CY54/74FCT480T Power Supply Characteristics Parameter Description Test Conditions Typ.[4] Max. Unit ICC Quiescent Power Supply Current VCC=Max., VIN < 0.2V, VIN > VCC–0.2V 0.1 0.2 mA ∆ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max., VIN=3.4V,[7] f1=0, Outputs Open 0.5 2.0 mA ICCD Dynamic Power Supply Current[8] VCC=Max., One Bit Toggling, 50% Duty Cycle, Outputs Open, VIN < 0.2V or VIN > VCC–0.2V 0.06 0.12 mA/ MHz IC Total Power Supply Current[9] VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=2.5 MHz, VIN < 0.2V or VIN > VCC–0.2V 0.7 1.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=2.5 MHz, VIN=3.4V or VIN=GND 1.0 2.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, Sixteen Bits Toggling at f1=2.5 MHz, VIN < 0.2V or VIN > VCC–0.2V 2.5 5.0[10] mA VCC=Max., 50% Duty Cycle, Outputs Open, Sixteen Bits Toggling at f1=2.5 MHz, VIN=3.4V or VIN=GND 6.5 21.0[10] mA Switching Characteristics Over the Operating Range FCT480AT Description FCT480BT Com’l Military Com’l Unit tPLH tPHL Propagation Delay A to EVEN/ODD 7.5 7.0 7.0 6.6 5.6 5.6 ns tPLH[11] tPHL Propagation Delay A to ERROR 7.0 8.5 7.0 8.1 5.6 6.5 ns tPLH tPHL Propagation Delay CHK/GEN to EVEN/ODD 6.5 7.5 6.3 7.4 5.9 5.9 ns tPLH[11] tPHL Propagation Delay CHK/GEN to ERROR 7.5 7.0 7.1 6.9 5.7 5.5 ns Notes: 7. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 8. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. = IQUIESCENT + IINPUTS + IDYNAMIC 9. IC IC = ICC+∆ICCDHNT+ICCD(f0/2 + f1N1) ICC = Quiescent Current with CMOS input levels ∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V) DH = Duty Cycle for TTL inputs HIGH NT = Number of TTL inputs at DH ICCD = Dynamic Current caused by an input transition pair (HLH or LHL) = Clock frequency for registered devices, otherwise zero f0 = Input signal frequency f1 N1 = Number of inputs changing at f1 All currents are in milliamps and all frequencies are in megahertz. 10. Values for these conditions are examples of the ICC formula. These limits are specified but not tested. 11. tPLH is measured up to VOUT=VOL+0.3V 4 CY54/74FCT480T Ordering Information Speed (ns) 5.6 Ordering Code CY74FCT480BTPC Package Name P13/13A Package Type 24-Lead (300-Mil) Molded DIP Operating Range Commercial CY74FCT480BTQCT Q13 24-Lead (150-Mil) QSOP CY74FCT480BTSOC/SOCT S13 24-Lead (300-Mil) Molded SOIC L64 28-Square Leadless Chip Carrier Military 24-Lead (300-Mil) Molded DIP Commercial 7.0 CY54FCT480BTLMB 7.5 CY74FCT480ATPC CY74FCT480ATQCT P13/13A Q13 24-Lead (150-Mil) QSOP Document #: 38-00281-B 5 CY54/74FCT480T Package Diagrams 28-Square Leadless Chip Carrier L64 MIL-STD-1835 C-4 24-Lead (300-Mil) Molded DIP P13/P13A 6 CY54/74FCT480T Package Diagrams (continued) 24-Lead Quarter Size Outline Q13 24-Lead (300-Mil) Molded SOIC S13 7 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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